Fuel cell engine shutdown purging system, control method thereof and fuel cell system
A fuel cell and control method technology, applied in the direction of fuel cells, electrochemical generators, circuits, etc., can solve the problems of reducing hydrogen utilization, affecting engine starting, stack damage, etc., shortening cold start time, and increasing utilization. , the effect of reducing performance
Pending Publication Date: 2022-03-25
BEIJING SINOHYTEC
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Abstract
The invention provides a fuel cell engine shutdown purging system, a control method thereof and a fuel cell system. The purging system comprises a regulating valve, a hydrogen jet, a water diversion piece, a tail exhaust valve, a three-way valve, a hydrogen circulating device, an air outlet throttle valve and an air inlet throttle valve, an inlet I of the regulating valve is connected with a hydrogen source, an inlet II of the regulating valve is connected with a nitrogen source, an outlet of the regulating valve is connected with an inlet I of the hydrogen jet, an outlet of the hydrogen jet is communicated with an anode inlet of a galvanic pile, and an anode outlet of the galvanic pile is connected with an inlet of the water diversion piece; the outlet of the hydrogen circulating device is connected with the inlet of the three-way valve; the outlet of the three-way valve is connected with the inlet of the hydrogen spraying device; the outlet of the three-way valve is connected with the inlet of the air inlet throttle valve; the outlet of the air inlet throttle valve is connected with the cathode inlet of the electric pile; and an inlet of the air outlet throttle valve is connected with a cathode outlet of the electric pile. The cathode and the anode are purged by the same N2 gas source, so that formation of a hydrogen-oxygen interface is avoided.
Application Domain
Fuel cells
Technology Topic
ThrottleNitrogen source +5
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